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通过对双回线环流网沿线电压分布的频域表达,推导出基于两端电流量的双回线故障定位方法其能够准确定位故障的前提是两端电流量从一次到二次的传变具有相同的传递函数。由此可得到如下结论:当两端电流互感器(TA)具有相同的频率特性时,可获得精确故障定位;当两端TA传变能力不同时,可以通过选择二者具有相同频率特性的频带或者通过补偿来实现精确故障定位;且单频率信号也能用来进行故障定位。仿真和现场录波数据验证了结论的正确性。
Based on the frequency domain expression of the voltage distribution along the double loop circulating network, a double loop fault locating method based on the current at both ends is deduced. The premise of accurate fault location is that there is The same transfer function. It can be concluded as follows: When both ends of the current transformer (TA) have the same frequency characteristics, accurate fault location can be obtained; when both ends of the TA transfer ability are different, you can choose both have the same frequency characteristics of the band Or through the compensation to achieve precise fault location; and single-frequency signal can also be used to locate the fault. Simulation and live recording data verify the correctness of the conclusion.